Variable-speed driving mechanism.



2 snEE'rs-sgEE'r i.

nwn rof PATENTEE MAR; .27, 190s.

w. L. SCHELLENBAGHI VARIABLE SPEED DRIVING ME'OHANISM.

APPLICATION FILED JAN.31. 1903.

@5 ci N v I Gmmp'n l W. L. SG-HBLLENBACH. v VARIABLE SPEED DRIVINGMECHANISM APPLICATION FILED IAN. 3l, 190.,

2 SHEETS-.SHEET 2.

l 1g EQ Q l i A III House lili- PATBNTED MAR. 27', 1906.

'y'concernlr oitizeno'f the United States, Ci n1iati,'in'theeountyofHamil-l @stated ""'W 'and'ilseful'flrnprovements inVariableasperger-DrivingMechanism; and I'do hereby `l`d"eelare"Halieiollovvin to be a full, clear, and "exactde'sicription fo'vthe invention, suchy as roWillfenablelothersskilled inthe art to whichL it iappertfains -to'make' and use the same.

f Iy finventionrelates A to 'improvementsl in 'variablefspeed' drivingmechanism, .Itl is par- "tinlarly'adap'ted for use -as a variable-speedx5 'eontferfsliaf "but may be lemployed'vto ad` *vanta e-iniotherrelations 'where a variable yi'"desirable: One of its objects is to,""var`ible" speed driving mechannnwhich`the?change of speed can bereadvf"convenient]y,` and quickly changed.v Another Objectis tov provideame'chanism l' liili a-wi'de variation .of speeds can be l. E ther ob]ect :is to provide `av mechanism nohra nnnn'rinm number of v parts are1n 'ia'otio atone time?" fi e.

i .is :tof provide improved l *eaisfforg effeetin'ga transition from onespeed t0., anotherivvithot'finjury or undue strain yon- ItY 'soonslstsimeertain details of form, nbin ioni` and arrangement,l all ofvwhich ""*Will bemore 'clearly setforth in the descriptionf-theaeeohpanying drawings, in'Which-f.-

]'-"s.a1 side elevation, partly in sec-- variablespeedI counter-shaftembodyingf thlevpreferred form of my, invention. l?" 2 isa similargview'showing a modicais .an enlar ed detail sectional 4 v-v showin'gthe.metho of vconnecting the 'respectivefchangegears tothe shaft; Fig. 4

A represents the frame in which the operayvel'partisiaremoiinted. I

- -Y 1:234y5'irepresent aseriesfof gears mountedont'shaft-:B1and'imeshing, l`respectively, with "eerst-7:89 menthe ShaftC. j

repr'egsents-.albossonenlargement of the 'shaft Bi,""ir`iwl1icli,is;outa slot b, 'whic h serves iasf'a"seat-:ioitthetssteln of a clutch orpaw] O,

Yl ichfis:pressedoutivardlyby.a spring t?.

representsfnotches on the-inner face of sci "i" "-1',thelgearsioreceivethe head of the paivl.

.sbiiietieh of Letters teiit. Application medi January' 31,` 190s. sm-a1No. 141.298.

at I, WILLIAM LORRAINE Ohio have invented certain A -i `s""a-" detailof. thegmechanis'm through `which theehangeof'fspeeds.iseffected. iFig..5 is a Fig. 6 is a detail,

-endii'ise 'through the gear. beemployed either as the driving or rnensides of the boss B', said sleeves being eldgin place-against the bossby collars and set-, screws f., and the bossV SerVing'to'hId, thesleeves spaced apart, thus to provide a slot or opening4 bx, throughwhich the head of the f i rammed march 27,1966. f

i F .Ff represent loose sleevesy on ,opposite Q.

paWl O .projects into engagement with the I notches E of the gears.lvided with a similar boss, clutch, or paWl and sleeves.

. The sleeves F have raok-teethfZ-eut'in their outer faces, which teethare engaged by pinions G G', mounted onl the controller-4 .shatt H,which is turned by hand-Wheel h to shift the shafts B C endwise tobrin(lr 4 the pawls intoengagement withl any desiredpair of earsthereon.

'representsa gear ontheend. of shaft C, which is retained 1n positionlby means' of the- The shaft C is pro# vcollar I', and ring 'i' engagingthefenl'arge'd end Iioithe j onrnal-b'ox, so that the-key fr slides l in.the hey-seat of ythe shaft `as thejshaft shifted endwise. Jrepr'esentsaGear meshirnr with gearI and mounted on s aft J', Whio may be emplc''edeither as the driving or driven shaft.

K `re}; resent pulleys, one of which ref 5 ceives a straight and theother Va cross belt. c represents a friction-clutch adapted tobe shiftedb f 'the key k to engage and drive either pn ley K or K and which Whenin a central position is disengagedv from' both.l

L represents a shifter-arm pivoted at L and carrying at itsupperendroller's' ljengaging a grooved collar Z which is connect-d "to andshifts the key k and clutch The arm L2 of the shifter carries a rollerl, which is eln-f l gaged by the 'cams M' M on Athe .controllershaftWhenever .it is employed to change the speed, to irst'throwtheclutoh kvto a central osi-tion andI relieve theparts of the driving oad,l afterwhich the cams come into position with vtheir notchesopposite the roller12,'1so- `that the -shifter can be employed to throw the pulleys again.Y

` As shown in Fig. 1, the. paWls-are lin the act of beingshifted fromone pair of gears to another. N represents afpu le)v` mounted on shaft.B `in a manner similar to gear I; solas to be driven bv a key entering akey-seat in-the shaft B andso that the shaft can be shifted This pullevcan the clutch into engagement with either oneof pulley` yas desired. Ipreferably. .ho\vever employt-he pulleys K K asdrivers, sothat i "whennot in use all motion of the gears is avoided.

. In the modification Figs. 2 and 3 I provide ac-ent gear 'before theotherhasfbecome disengaged from the preceding one ,.a's shown in Fig. 3,in which case either' one or the other of the paWls-is V-foreed into itslstLeket by reason of the gear moving faster thanthe Vpawl until bothpawls have been shiftedinto engagement with the 'i'sarnegearg Thesepawls ar'e beveled to cause .them to'catch in one direction only as they'are' shifted laterally, so that one pawl is in position to engage onegear and the other is still inposition to4 engage the last-used gear.

f r 'lhius, the pa'Wl's on the driving-shaft will tend drive both gearswith. which they 'en age,

" j but the pawls on the driven shaft cannot oth engage; but the onebeneath the gear which 'is traveling the fastest will engage to drivethe driven shaft, Which Will'cause the driven cess in the shaft.

shaft to--revolve faster than the slow gear thereon, with the resultthat theslower gear on'the'driven shaft Will at'intervals, by means ofthe rear inclined faces of the paWl,vforce 'the pawl at appropriateintervals into the re Thus I am enabled, particlularly-With light Work,to avoid disengaging 'i In Figs. from opposite sides the-clutch at everychange of speed, as one set ofpawls picks up the new speed andthe otherset is released .Without undue jar or strain. j

Where the two sets of pawls are employed, I 'preferably employcushioningesprin'gs P between the shafts B 'and pulley N, which servetovtake up or relieve any strain due to the change of speeds. lThis'ispreferably effected 'as fol oWs:- Q represents a stationary bushing onWhchthepulley N revolves. Q repvresents a revolving sleeve, which servesasa housin for the sleeve F and is driven 'by the vshaft .'byl means ofa slidin ',key. This sleeve Q carries a plate It, Whie has ear R. Thespring P rests at one end against the ear R and at the lother endagainst projections on the ulley, so that the4 strain of the belt on thepullfeycompresses the springs to'a 'greater or-less extent.

In Fig. 1 I have'show'n onlyone paivl to ach shaft; but' one or more maybe employed, as desired, on one or more sides of the shaft. 2 3, and 5they are shown projecting of the shaft. j In Fig.. 2 I'have shown thepulleys K K and-clutch k, mounted on an extension ofthe shaft C, therebydispensing with the shaft J and gears I J'. The cams M M are not sho wnin Fig. 2,'but may b e employedthereon, if desired.

The sleeve F may, if desired, be tight on the shaft or lntegraltherewith, forming part 'of the enlargement, but are preferably conj gexcept the pair 'in engagement with the (pa-Wl comes sienes structed asshown. As thus constructed there is less Wear on the bore of the gears.

It -will be noted that .all the change gealls aw s are `out of contactwith the shaft 'an i idle and do not move.

Having described my invention, what I claim is- 1. In a variable-speedmechanism, a driving-shaft ada )ted to be adjusted endwise and providedWit, a key; a series of gears loosely mounted on said shaft andadaptedto be respectively engaged and driven by said key a driven'shaftprovided with a key and adapted to be shifted endwise and a series ofgears on said driven shaft 'in mesh with the gears. on thedriving-shaft, and adapted to respectively impartmotion to the drivenshaft by .means of the key carried by the driven shaft.

2. In a variable-speed mechanism, a driving-shaft having an enlargedportion, a key seated in said enlarged portion; a sleeve servl ing as ajournal for the reduced portion; a series of gears looselymounted on thedrivingshaft, and adapted to be respective] engaged by the key as theshaft is shifte end wise; means forengaging the sleeve to shift theshaft endwise; a driven shaft having an enlarged portion; a key seatedin'said enlarged portiona sleeve serving as a journal for the reducedportion of said shaft; a series of gears loosely mounted on the drivenshaft and in mesh with the gears-on the4 drivingshaft, said gears beingadapted res ective y to engage the key on the driven shaft and transmitmotion thereto by shifting the driven shaft endwise; and means engagingthe sleeve on the ldriven shaft to shift it endwise. 3. In avariable-speed mechanisina driving-shaft having an enlarged portion; akey seated. in said enlarged portion; a sleeve serving as a journal forone end of the shaft; a series of gears loosely mounted on the shaft andadapted to be respectively engaged by the 'key b shiftingy theshaftcndwise; a driven shaft aving an enlarged portion; a key seating in saidenlarged portion of the shaft; a sleeve serving as a journal for one endof the shaft; a series-of gea-1s loosely mounted on 'the drivenshaft,'and adapted to ybe -res ectively en aged by the key of the drivens aft as said siaft is shifted endwise; and means engaging the sleevesof the driving and driven shafts to shift said shafts endwise in unison.

4. In a variable-speed mechanism, a driving-shaft having an enlargedportion sleeves mounted on said shaft on opposite sides of said enlargedportion; a keyl seated in said enlarged portion; a 'seriesof gearsloosely mounted on the shaft and adaptedto be engaged respectively bysaid kev` as the shaft is `shifted endwise a driven shaft having anenlarg'ed` ortion; sleeves upon opposite sides of said en arged portion;a series o gears loosely mount-ed on said shaft and in mesh with thegears on the'driving-shift;y said gears on the driven shaft beingadapted to be respectively 'engaged by the key of the driven ysha ft asit is` shifted endyvise to drive'the driven shaft-'g and means engagingt-he sleeves atone'end on the driving and fdrivenshafts to 'shift saidshafts endwise inunison. L... Ina variable-speed inechanisnn a drivlvseated said enlarged portion; a sleeve servingas-aournal ferone endofthe shaft a se ries 'of gears loosely mountedon the shaft and adapted,to be .respectively enga ded' and jdriyedbyky as the shaft is shiftedend- W1Se"adr1v-en shaft having anienlaiged por* tiona key'seatedinfsafid enlarged portion; a sleeveservmgas a ]-ourna1 for'one,end of said lsha.ft'; a, series ofgears loosely, mounted on sai d fshaft an'din mesh with the'gears on the" jdrivnig'shaft, saidfgearsbeing adapted to be respectively engaged bythe keycfthe drivenshaftasitis shifted ,end wise 'to' impart motion tov the fdr iven shaft;'driving Aand driven pulleys; a'controlling mechanism engaging the'sleeveslon'the driving -and driven shafts to' sa-id shafts endwiseuinunison; and

means for automatically disengagingthe load before eachgchange of speed.

6. Ina .variable-, speed mechanism; a driv-v ing-shaft having anenlarged portiong'akey seatedfinzsaid enlarged port.ion;'a sleeveserving as ajournalfor one'end of the shaft;.a se-cv ries of gearsloosely mounted onl theshaftand adapted'. -t-o be respectively 4enga .edland driven by the key as the shaft. is shi ed endwise; adriven'shafthaving an enlarged portion;a key seated in said enlarged portion ;.a

sleeve serving as a. journal for one end of said shaft; a series ofgears loosely mounted on said shaft and in mesh With the gears on thevdrivingeshaft, said gears being-adapted to be respectively engaged bythe key of the driven shaft-as it is shifted endwise to impart mtio'n tothe driven shaft; driving. and driven driven'shaft provided with a key'and-adapted to befshift-ed endwis'e: a series of gears on said drivenshaftm mesh with the gears on the dr1v1ng-shaft and adapted to respec-Ttively impart motion to the driven shaft by means of the kev carried bvthe driven sha-ft a driving and driven pulley; a controlling mechanismadapted'tol shift the shafts end- Wise; and means operated by thecontrolling each change of speed;

- .provided with a'key a Iseries 'o driven lshaft pr vided yvvitl Vmeansof the key carried b driven by either of said'npu by the c'ontrcllingmechanism? f 'said clutchto 'releasethefilotf Beforer 'ing-shaft, adriven shaft, Va plurality of different -sized gearsthrugh 'the boresvof Whlch mechanism for disengaging 'the 'load before L l 8.- Inavariablespeed i lng-shaft adapted'to be 'adjiis mounted on said vshaftandy at speetively engaged and 'driven "byfsafir ed to he shifted`endwiseyafs said driven shaft in mesh with the. the driving-shaft,and-iiA tively impart'motion to the a pulley adapted todrive-.sa theforward dir ection;a' le drive said mechanism in fthe tion; aelutehadapted't mechanism 'adapted to shift drlv'en shafts 'end-Wise; an

change of speed] 9. In a variabl'espeed mec ing-shaft provided with aslif'r' g leasingfclutch' influencing the rotatigin shaft, fa pluralityof different-sia Wheels suspended arouni l' adaptedto engage said' sdriven 'shaft provieed vitf plurality of different -siz pen'fed aroundsaid shaft gage said clutch', and mea releasing-clutehl on the drshifting the driving and L in unison atasinfle movement 1.0. In avariable-speed mechanism, a driving-shaft-a driven shaft, a plurality ofgears of different sizes mounted concentrically withY but not in Contactwith said shafts, clutch memberson the vrespective shafts adapted totravel through said gears in unison and to respectively bring intooperation different. pairs of said gears, a controlling mechanismadapted toV shift said clutch members along the shafts, a-nd meansoperated by the controlling mechanism for disengaging the load beforeeach change of speed 1l. In a variable-speed.mechanism, a drivsaidshafts pass, clutch members on the respective shafts adapted totravelthrough the bores of the gears, and to respectively bring into-operationdifferent pairs of saidgears to yeffect a change of speeds, acontrolling mechanism adapted to shift said clutch members along theshafts, and means operated in unison with the controlling mechanism fordisengaging the load before eac-lr cha-nge ofy speed.

12. In a. speed-variator, a pair of shafts,l means for driving one ofsaid shaftsa clutch controlling the said drive, intermeshing pairs qfgear-wheelsof different diameter 13o loosely --sul-)ported rela-tivetio/I said` shafts,

clutch-sleeves sliding -on said 4shafts Within' the gear-wheel bores,lthe said sleeves having racks, gear-Wheels betweensaid sleeves en.-vgaging said racks, and means for actuating said last-named gear-Wheels,whereby the said clutch-sleeves are shifted simultane-A ously Yin eitherdirection, substantially as described.

13.. In a speed-variator, a pair of shafts,

means for'drivingvone of said shafts, intermeshmgpairs of gear-Wheels ofdifferent d1- ameter loosely su ported relative to said shafts, clutchessiding Within said gear- Wheel bores adapted to fix any selected pairofr intermeshing gear-wheels to their.. shafts,

and rack and. gear Wheel mechanism for- -shiftin said clutchessimultaneously, substantia ly as desnribed.

14. In invariable-speed mechanism, a driviing-shaft having anenlargement, a: series of pawls seated in the enlargement, a 'sleeveconstituting a journal for one end of the shaft, a series of'gearsloosely m .unted o'n the shaft and adapted to be respect vely engagedand driven by the pawls as the shaft is shifted endwise, a driven'shafthaving an enlargement, a series of pawls seated in the en# largement, asleeve constituting one end ofthe shaft, a series o gears looselymountedy on the shaft and inffmeshwit'h the.

gears on the driving-shaft, said gears being adapted to berespectively-engaged by the pawls on the driving-shaft as it is shiftedendwise to impart motion to the driven shaft,

a journal for autres the arrangement of each of the plmjls feah shaftbeing suah that Il(me of the gears is en gage@ by s Paf-t af @si Seas 0fpsw before prising two shafts, seitarate gears of diiferent [sizerevolubly supported on each shaft, the gears on one shaft meshing withthose on the other shaft in reverse order,y each shaft movable4 axiallywith reference to the gears thereon, a feather for locking each'shaft toan one" gearfthereon, and means for sluiting the s afts through thegears and thereby unlocking them .thepreceding'- gear is eleased by theremaining pawls. V

15. ,A speed-chan .'ng mechanism, comwears thereon, afea'ther forlwhereby the axial movement of O neshafteffects the axial `movement ofthe other'shaft,

as set forth.

In testimony whereof I have afliged my signature in presence of twowitnesses.

WILLIAM LORRAINE SCHELLENBACII.

Witnesses:

C. W. MILES CHARLES F. DOLLE.

